[R] adjusting a periodical function to a time series

[Hagen Schmöller]

Hi R-Community,

is there a possibility to adjust a periodical function like

s(t) = a1 sin(f1 t) + b1 cos(f1 t) + a2 sin(f2 t) + b2 cos(f2 t) + ...

to a time series with R, if necessary with given frequencies fi.

Much thanks in advance,

Hagen Schmoeller
--
Dipl.-Ing. Hagen K. Schmöller
Institut für Elektrische Anlagen und Energiewirtschaft, RWTH Aachen
Schinkelstraße 6, D-52056 Aachen, Germany
Tel.: +49 (0)241 80-96734
Fax : +49 (0)241 80-92197
Hagen.Schmoeller at iaew.rwth-aachen.de